bluegrass

noun

blue·​grass ˈblü-ˌgras 

1

: any of several grasses (genus Poa) of which some have bluish-green culms

especially : kentucky bluegrass

2

[from the Blue Grass Boys, performing group, from Bluegrass state, nickname of Kentucky] : country music characterized by the use of unamplified stringed instruments (such as banjo, fiddle, guitar, and mandolin), by free improvisation, and by close usually high-pitched harmony

Examples of bluegrass in a Sentence

Recent Examples on the Web

Following the 1996 death of Bill Monroe, who is widely considered the father of bluegrass, the picker felt a profound calling to return to his roots and, in a way, pick up the torch from Monroe. —Chris Barilla, PEOPLE, 2 May 2026

Want to listen to jazz or bluegrass groups or house DJs at an outdoor concert? —Fritz Hahn, Washington Post, 1 May 2026

On Fridays in summer, snag a spot outside for the Music & Moonshine live music series and a rotating calendar of bluegrass, Americana, and old-timey tunes. —Belinda Luksic, Southern Living, 1 May 2026

On Sunday, the lineup includes Tatiana Hargreaves, a rising-star in the bluegrass fiddling scene, with her band and special guest Michael Daves; the honky-tonk duo Caleb Lauder and Reeb Wllms with their band the Cali Cutups; and Pleasanton native and all-world strings player Tony Furtado. —Randy McMullen, Mercury News, 30 Apr. 2026

Word History

First Known Use

1751, in the meaning defined at sense 1

Phrases Containing bluegrass

• Kentucky bluegrass
• rough bluegrass

Rhymes for bluegrass

• alas
• amass
• bromegrass
• bypass
• chagas
• crabgrass
• crevasse
• eelgrass
• eyeglass
• groundmass
• harass
• impasse

Kids Definition

bluegrass

noun

blue·​grass -ˌgras 

1

: any of several grasses with usually bluish green stems

especially : Kentucky bluegrass

2

: country music played on a small group of instruments (as banjo, fiddle, and mandolin) with melody or harmony often made up by players during a performance

Geographical Definition

Bluegrass

geographical name

Blue·​grass ˈblü-ˌgras 

region of central Kentucky where Kentucky bluegrass abounds that is noted for the breeding of fine horses